Refacing tool



April 5, 1949. M, R SCHLOSSER 2,466,483

REFACING TOOL Filed Dec. 9, 1947 wwf/MM Patented Apr. 5, 1949 UNITEDSTATES PATENT OFFICE 2,466,483 REFACING TOOL Michael P. Schlosser,Byram, Conn. Application December 9, 1947, 'Serial No. 790,548

12 Claims. l

This invention relates to a refacing tool.

It is an object of the present invention to provide a refacing tooladapted to be extended over ashaft projecting from a housing to effectupon the end of a .projected bushing through which the shaft is extendeda, smooth face with which the sealing ring of an yoiltight sealsurrounding the shaft engages for oiltight'contact.

It is another vobject of the present invention to provide a refacingtool for compressors used on refrigerators wherein a new face can beplaced on the bushing extended through the compressor housing withouthaving to disassemble the compressor other than removing the motor whichdrives the same therefrom.

It is another object of the present invention to provide in a refacing-tool -for the end faces of shaft bushings adequate support for the toolwhich may be connected yto -the shaft to serve as an extension andwherein there will be provided automatic spring 'pressure formaintaining the abrasive upon the bushing while the same 'is rotated onthe shaft extension and wherein this spring pressure may beadjusted-by asimple and easily operated adjusting means.

Other objects of the present invention are to provide a refacing toolfor refacing the ends of shaft bushings without having to disassemblethe enclosing structure., ywhich is of simple construction, inexpensiveto manufacture, easy to install and efficient in operation.

For other objects and for `abetter understanding ofthe invention,reference may be had to the following detailed description takeninconnection with the accompanying drawing, in which Fig. l is acollective side elevational view of the motor seal displaced from theshaft of a compressor and of the tool embodying the features of theprese-nt invention connected to the shaft for operation upon the shaftbushing with yportions broken away to show the interior of the same.

Fig. 2 is a fragmentary perspective view of the shaft extension of theform of the invention shown in Fig. 1.

Figs. 3 and 2l are respectively slightly different forms of the shaftextension.

Fig. 5 'is 'a perspective view ofthe locking ring adapted to lit theshaft extensions shown in Figs. 2, 3 and 4.

Fig. 6 is a 4side elevational view of .a still furtherfcrm of the tool.,in which the shaft -extension is locked to Ithe shaft, theAllenscrewbeing used for thisp-urpose, the vsame as theform shown inFig. 1.

Fig. '7 is a side elevational view of another form of the invention withportions broken away and shown in section of the tool which is connecteddirectly to the shaft and may be used only when the compressor or otherstructure of which the shaft is a part has been disassembled for accessto the end of the shaft in order to permit the removalof the tool.

Fig. 8 is a perspective View of one of the abrasive elements.

Fig. 9 is a fragmentary and sectional view of a modified form of theinvention.

Referring now to Fig. 1, I5 represents a compressor such as `used voncertain refrigerators and which has a pump rotor yI 6 with'ashaft I1which extends outwardly through a bushing I8 in a cover plate IS. Thebushing I8 has its end extending -beyond the face of the cover plate andprovides a surface for -an oil seal `device 2I having a ring member 22with a face 23 adapted to have sealing engagement with the end face ofthe bushing I8. Thisseal 2| has a exible housing forming a part thereofto cover the shaft and a vportion 2li adapted to be threaded upon thethreaded end of the shaft II as shown at l25. The member 24 has vafianger26 with pins 2-'I extending therefrom to-'nave driving-engagementwith openings on a coupling flange of an electric motor which drives thecompressor. The face 23 .of the seal often becomes worn and the seal isremoved from the shaft for the purpose of resurfacing the same. This canbe done by rubbing the ring face 23 on emery cloth resting on aflatisurface. The end face of the bushing I8 is more difficult toresurface. To effect this operation without having to disassemble thecompressor and while in place on the refrigerator, the electric motorand the seal 2| are removed from the shaft I'I. My tool is thenconnected to the shaft I-'I and upon rotating the same a new surface isplace on the bushing I8.

The tool, according to the form shown in Fig. 1, includes a shaftextension 2.8 which is internally threaded and hollow throughout. Thisextension is applied to the threaded end 25 of the shaft I1 and islocked in place thereon `by an Allen screw 29. The outer endof theextension 28 is knurled as shown at v3| to facilitate the threading ofthe same upon the shaft portion 25. With the extension 28 locked inplace, the same will serve as a support for a rotatable holder 32. Thisholder has on .its inner end a Washer of abrasive paper or cloth. Thiswasher is indicated at 33. The washer is retained by a retaining sleeve'34. The

washer will engage lwith the end of the bushing and as the rotary member32 is rotated, the end of the bushing will be refaced.

In order to provide a pressure urging the emery cloth toward the end ofthe bushing, the outer end of the sleeve is provided with a groove 35adapted to receive a pin 36 of a retainer 31. The retainer ring 31, whenarranged so that the pin 36 is located in the grooves 35, will serve asa stop for a pressure spring 38 surrounding the extension 28 and actingupon the rotor body 32. It will be noted that one or more pins 36 arelocated in the ring 31 offset from the center. The purpose of this is topermit the retainer to be adjusted or inverted so that a differentspring tension will be applied to the rotor body. As viewed in Fig. 2,there are one or more longitudinal grooves 4I to permit the pins 36 tobe extended to the grooves 35. In order to provide for additionaladjustment or for a different location of the ring 31 on the sleeve 28in order to give a further variation of the spring pressures, there areprovided two or more grooves 42 and 43, as shown in Fig. 3. Longitudinalgrooves 44 will permit the projection 36 to be adjusted along theextension and enter the grooves 42 or 43. In order to prevent the ring31 from becoming angularly displaced when it is in use in such a manneras would release the same from the extension 28 and notches 45 areprovided in the edge of the grooves for receiving the pin 36.

In Fig. 4, it will be noted that there is shown a spiral groove 48,about which the pin 36 can be rotated to locate the ring 31 at differentdistances along the sleeve 28. Longitudinal grooves 49 are provided forreceiving the pin and likewise there are notches for retaining the ring31 at the differently angled locations.

In Fig. 6, there is shown another form of the invention utilizing aninternally threaded sleeve 52 adapted to be secured to the threaded end25 of the shaft I1. This screw is locked in place by an Allen screw 53.Rotatably mounted on this sleeve 52 is a rotary member 54 on which isaxially adjustable, a washer retaining member 55 having a washer 33 anda retaining ring 56 for securing the washer to the member 55. Thismember 55 is axially adjustable on the rotary member 54 and this axialmovement is limited by a stop screw 51 which may engage opposite ends ofan elongated slot 58 in the member 54. A spring 59 surrounds the member54 and acts between a shoulder 6I and the outer end of the member 55whereby to urge the member 55 toward the bushing face when the tool ismounted on the shaft I1.

In order to vary the tension of the spring 59, the sleeve 52 is providedwith threads 62. On the thread portion 62 are lock nuts 63 and 64. Thelock nuts can be adjusted to any position along the thread portion 62whereby to position the member 54 at a different location on the sleeve52 so as to alter the tension of the spring 59.

In operation, the extensions are first fixed to the shaft I1 and thenlocked with the screws against displacement therefrom. Thereafter therotary members are disposed on the extensions for angular adjustment toeffect the refacing operation by the engagement of the abrasive with theend of the bushing. It will be apparent that with this arrangement of anextension that the tool can be easily released from the shaft upondisassembling the same. The shaft itself can be 'held while turning theextension from the same.

In Fig. 7 there is shown a form of the invention which is adaptablewhere the compressor has been disassembled and access can be had to therotary part thereof in rear of the cover I9. In this form, there is anabrasive retaining member 16 on which is xed abrasive 11 by a retainerring 18. This member 16 is mounted for axial adjustment on a handle orrotary member 19. This member 19 has a threaded opening 8| for receivingthe threaded portion of the shaft I1. The member 19 has a large knobportion 82 by which it can be turned. A spring 83 is disposed on themember 19 between the knob portion and engages with the outer end of theretainer. A stop screw 84 acting in slot 85 limits the inward andoutward movement of the retainer member 16 on the member 19. In thistool there are less parts but once the tool has been assembled on theshaft, it is necessary that the rotor body I6 of the shaft be retainedin order to loosen the tool from the shaft.

In Fig. 9 there is shown a still further form of the invention in thatthe ring with the pin projection is dispensed with. A pin 81 is placeddirectly in the rotary member 88 and a groove 89 is located in the shaftextension 9| closer to the inner end of the same. A pin 92 is extendedthrough the extension 9| to lock the extension on the shaft I1. Therotary member 88 is placed on the extension 9| by sliding the samethereonto by aligning the pin projection 81 with a groove 93 on theextension 9| and thereafter when the pin 81 has arrived in the groove 89rotating the same so as to lock with any one of the notches 94. The'notches 94 are of different length in order to provide for a differentadjustment of the spring surrounding the rotary member.

It should be apparent that there has been provided a locking device forround members on which there is to be disposed a rotary member to beadjusted thereon, a simple and easily connected and -adjusted lockdevice. Such, lock device can have application on ordinary bolts toretain a nut in place or upon a shaft having a driving rotary element.

While various changes may be made in the detail construction, it shallbe understood that such changes shall be within the spirit and scope ofthe present invention as defined by the appended claims.

I claim:

1. A refacing tool for refacing the end of a bushing having a shaftextending therethrough, comprising a member adapted to be secured to theshaft, an abrasive retaining member axially adjustable on said member,and spring biasing means extending between the member and the abrasiveretainer to urge the abrasive retainer toward the end. of the bushingwhile the parts are being rotated to reface the same.

2. A refacing tool for refacing the end of a bushing having a shaftextending therethrough, comprising a member adapted to be secured to theshaft, an abrasive retaining member axially adjustable on said member,and spring biasing means extending between the member and the abrasiveretainer to urge the abrasive retainer toward the end of the bushingwhile the parts are being rotated to reface the same, and a pin and slotconnection between the member and the retainer for limiting the axialmovement of the retainer on the member.

3. A refacing tool for refacing the end of a bushing having a shaftextending therethrough, comprising a member 'adapted to be secured tothe shaft, an abrasive retaining member axially adjustable on saidmember, and spring biasing means extending between the member and theabrasive retainer to urge the abrasive retainer toward the end of thebushing While the parts are being rotated to reface the same, and meanson said member and acting against the abrasive retainer to adjust thespring tension.

4. A refacing tool adapted to reface the end of a bushing through whicha shaft is extended, the shaft having a threaded portion, an extensionadapted to be connected to the threaded portion of the shaft, a lockingscrew for xing the extension to the shaft, an abrasive retaining memberrotatably adjustable on the shaft extension, spring retainer means onthe extension, a spring extending between the spring retainer and theabrasive retainer.

5. A refacing tool adapted to reface the end of a bushing through whicha shaft is extended, the shaft having a threaded portion, an extensionadapted to be connected to the threaded portion of the shaft, a lockingscrew for fixing the extension to the shaft, an abrasive retainingmember rotatably adjustable on the shaft extension, a spring retainer onthe extension, a spring extending between the spring retainer and theabrasive retainer, said spring retainer having a pin projection, saidextension having an annular groove and a longitudinal groove connectedtherewith to permit the passage of the pin projection of the springretainer to the groove for locking engagement therewith when angled fromthe longitudinal groove.

6. A refacing tool as defined in claim 5 and said pin projection beingoffset from the center of the spring retainer whereby the springretainer may be inverted and applied to the extension in a differentposition to alter the spring tension.

'7. A refacing tool as defined in claim 5 and said extension having aplurality of grooves adapted to receive the pin projection of the springretainer and the grooves being longitudinally spaced from one another onthe extension, longitudinal grooves leading to the annular grooves tpermit the passage of the projection thereto.

8. A refacing tool as defined in claim 4 and said spring retainer meanshaving an inwardly extending pin projection, said extension having aSpiral groove adapted to receive the pin projections of the springretainer and longitudinal grooves extending along the extension from onesection of the groove to another, and said groove having notches in theside thereof adapted to receive the pins at the angled positions of thespring retainer on the extension.

9. A locking arrangement comprising a round member having an annulargroove therein and a longitudinally extending slot extending from oneend of the member to the groove, a locking member adapted to be extendedover the round member and having a pin projection extending inwardlytherefrom and adapted to pass through the longitudinal groove of theround member to the annular groove thereof and to be rotated for lockingengagement with the groove.

10. A locking arrangement comprising a round member having an annulargroove therein and a longitudinally extending slot extending from oneend of the member to the groove, a locking member adapted to be extendedover the round member and having a pin projection extending inwardlytherefrom and adapted to pass through the longitudinal groove of theround member to the annular groove thereof and to be rotated for lockingengagement with the groove, and said groove having in one side thereof anotch for the pin to retain the locking member against rotationaldisplacement.

11. A locking arrangement comprising a round member having an annulargroove therein and a longitudinally extending slot extending from oneend of the member to the groove, a locking member adapted to be extendedover the round member and having a pin projection extending inwardlytherefrom and adapted to pass through the longitudinal groove of theround member to the annular groove thereof and to be rotated for lockingengagement with the groove, and said pin extending from said member inan offset position from the center thereof and adapted to enter thegroove when the rotary member is extended onto the round member in areverse manner whereby to provide for a different adjustment of thelocking member upon the round member.

12. A locking arrangement comprising a round member having a spiralgroove therein and a longitudinally extending slot `extending from oneend of the member to the groove, a locking member adapted to be extendedover the round member and having a pin projection extending inwardlytherefrom and adapted to pass through the longitudinal groove of theround member to the spiral groove thereof and to be rotated for lockingengagement with the groove, said spiral groove being continuous for morethan one turn, and said groove having notches in the side thereof forreceiving the pin to retain it against angular displacement.

MICHAEL P. SCHLOSSER.

No references cited.

